Frozen didn't click until the main characters were reimagined as sisters with a complicated relationship. Co-director Jennifer Lee talks with Fast Company about the collaboration that resulted in the highest-grossing Disney animated film of all time.

With a major new Disney video game on the way, the legendary animator behind Toy Story and The Incredibles explains how his partner and close friend Steve Jobs inspired his work: "Everything is based on a simple rule: Quality is the best business plan, period."